Clip for hoses and the like



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Nov. 14, 1944.

Patented Novi14, 194:4

UNITED sTATEs PATENT oFFlcE 7 claims. (orar-19) A v onlyfbeen achievedat the expense of production.

This invention relates to clips for hoses and the like and whilsttheclips are especially applicable for connecting flexible vtubularmembers to rigid tubular members, as for example in the watercirculating systems of water cooled engines lsuch as are used on motorcars, the clips are also ap- "As'kinfthe known clips the'cuttery is ofdiierent plicable in any case where the end of '.fiexible tubing isadapted to be connected to a rigid tubev or tubular member or Where aclip is to be tightened around an article;

The present invention relates to clips of the i v` type comprising ametal band of which the `en'ds overlap, the outer overlapping end beingprovided with slots, or theirequivalent yfor engagement fby a screwrotatably mounted in a housingsecured to the other overlapping end andhaving means for the rotation thereof.

vdiameter lto the screw the latter when engaging with the slots in theband cuts into these or otherwise damages them so that considerablefriction is set up.

' In the known type of clip a washer, bearing against the opposite endof the housing is located ,wat the .opposite end of the screw for takingthe thrust when slackening the clip.

It isthe object of the present invention to provide -an improved form ofclipwhich obviates theabve disadvantages and whereinthe screw In knownclips of this type a shoulder isfo'rmed f at the operating end ofthescrew, the shoulder being formed by a head or collar which is oflarger diameter than -the screw. This construction has thedisadvantage-.thatwhenthe diamv eter of the clip isl increased' beyondva lpredeter- Langages; accurately with theslots or the like in :theband,V whilst the screw is retained in the housing ,by-lend platesor thelike abutments of ccording .tothe present invention a clip of the typedescribed is provided with a screw or mined amount the radius fofcurvature ofjthe, t

band is increased so thatthe outerl overlapping end of lthe` clip'approaches the headz of thescrew edgeof the Shoulder,` asvvaviesultlof-whichthe slots or their equivalent-in tl'e outeroverlappihg f end arecut lorvdamaged vby. the' shoulder-'both during the 'tighteningk and theslackening f ofl 'the clip.

when tightening theiclip andasjthe difference in diameter between thehead andthe screw `is considerably restrictediorthe reasons set out'above, that is to saythe free end ofibandvmust normally notcome intocontact withthe head;

Aand freely Acomes' intov contact with thefshar'p worm' of whichthe end,provided with means for its 'manipulatiomihas ay shoulder which bearsagainst.aplateorizwashen or like abutment secured,,to oriorming partofthe adjacent end of gthehousing,A for takingl up thethrust whenslackeninglthe clip.l f

ggnent securedwtmonronning part of the corre- 'spondingjend "fofjthehousing, ,for taking kup the 39 fthrustgwhen tightening the cup. i;

` 'According .to-"another aspectofthe invention f f alcli of 'the t.described is rovided with a The .shoulder'also serves to rtake vthethrust'r p ype p screw or worm whichiattitsr'ear endbears against a cap`Orf-gplate onlikexahutment secured to. or forming partA uffthere''arvend'of the housing, for

-l taking upthrusts whentightening the clip, whilst xthe ,frontendor.thescrcw,bears against a plate the area of the shouldervavlatilable'e for taking the. thrust, when tightening and which may becon-f, siderable, is veryfsmall. As a result a veryhigh f intensity ofpressure is applied to the shoulderV f and the friction on this`shoulder yis considerable As the diameter of the head is thus limitedin this known type of clip thediameter of the screw is correspondinglylimited. y

'I'he slots inV the band are formed by a cutter which-can only beproduced down to a denite minimum diameter for commercial purposes andin order to effect a reasonable number of cuts. Attempts have been madeto reduce the diameter of the ,cutter to that of the screw but this hasor' .washer or,likeabutment-secured ,tol or form- -l ingfprovided at.one end withmeansior the manipulation tl ie'1eof.`pj"'- i" i ing .partof the'housingforf taking up thrusts when slackenirigfthe l clip',^ they worm ori-screw be- The plate" or washerfat "the, `front lend of theIhousing is preferably securedin position by means of projectionsfonfthehousing which pass through holes intheplate orfwasherand are thenriveted over. 'n

This plate orwasher maybe provided with a central holethroughwhichpasses an operating head of'smaller size than thescrew orworm and extending therefrom. .1

The plate or cap at the rear end of the housing may be .domed oriiat'and is secured in position, preferably by spot welding. The housingand the end plates or the like may also be formed l Figure 1 shws a sideview of a clip partly in section.

Figure 2 shows an end view of the right hand end of a housing, and

Figure 3 shows in section a modication of the left hand end of ahousing.

As shown in Figure 1, the clip consists of a band of metal I withoverlapping ends 2, 3. The overlapping end 3 and the portion o! the bandI passing through a housing 4 is provided with transversely arrangedslots or their equivalent for en gagement by a worm or screw l of whichthe thread may be square as shown or of other suitable shape providedwith a fiat periphery.

The thread o1' the screw 5 engages with the overlapping end 3 of theband I over an angle a.

The screw 5 is a tight llt in the housing 4 which latter forms a bearingfor the screw 5 and serves to bed the screw 5 in the slots of the band3. In this manner eilective engagement between the thread of the screw 5and the slots in the band 3 is obtained.

The diameter of the screw 5 is approximately the same as that of acutter used` for cutting the slots in the band 3 as a result of whichliability of cutting or otherwise damaging the slots by the screw 5 isavoided, thus increasing the life oi the band 3 and consequently of theclip. This arrangement also serves to reduce friction when turning thescrew.

At its right hand or front end the screw 5 is provided with a. head 8which is of smaller diameter than the screw 5. As the` head 6` is ofsmaller diameter than the screw 5, the head 6 is not liable to contactwith the overlapping end 3, so that there is no possibility oi' theslots in the overlapping end 3 being damaged or cut by the head 3.

The shoulder 'I formed between the screw l and ening and is in theopposite direction thereto. is light and can be taken up adequately bythe washer I so that this can be secured in position as described.

By the use oi a screw 5 of larger diameter than the head 6, there'isalso obtained the advantage that a screw of larger diameter can be usedthan when the head is larger than the screw. With a large screw thethread and also the clip may be made stronger than is normally the casewith a smaller screw. Further the angle of engagement between the screwand the slots in the clip is larger than when a smaller -screw is used.

In the modification shown in Figure 3 a at plate I0' is secured to theleft hand end of the housing 4 for taking the thrust of the screw 5 whenthe clip I is tightened. In this case the screw 5 is provided with ailat rear end whilst the right hand end of the screw 5 may be providedwith a square hole I3 for engagement with a tool of corresponding shape.

The head 6 (Figure 4l) of the screw 5 is provvided with a slot I2 forengagement or a -suitable the head 6 bears against a plate or washer 8which is secured in position by projections 9, provided at the end ofthe housing 4, which pass through corresponding holes in the washer 8and are then riveted over. 'I'he head 8 passes through a suitable holein the washer 8.

'I'o the left hand end of the housing 4 is secured, for example by spotwelding, a domed cap I Il against which bears the domed end II of thescrew 5. y

The curvature of the dome II is the same as that of the `cap IU so as toprovide a large area of contact between the two abutting surfaces.

With the arrangement as above described there is obtained a satisfactorythrust arrangement as the front end of the screw 5 bears against thewasher 8 and the rear end against the cap Ill.

When the clip I is tightened. the reaction on the screw 5 is in adirection from right to left in Figure l. When the clip is slackened thethrust, which in comparison with the thrust when tighttool or implement.The head may, however, be of circular, square or hexagonal cross sectionor may be provided with iiats for engagement by a suitable tool. It iseven possible to provide a slot in the front end of the screw or worm,for engagement by a tool or other implement, to which access is obtainedthrough the hole in the washer 8.

The housing 4 and the end plates, 8, I0 may be formed as an integralcasting.

1. In a clip for tightening a circular metal band having an underlappingend and a transversely slottedoverlapping end, the combinationcomprising a housing, a plate secured to the front end of said housing,a cap secured to the rear end of said housing, and a worm rotatablymounted in said housing between said plate and said cap, said wormhaving an annular bearing surface bearing against said plate.

2'. In a clip for tightening a, circular metal band having anunder-lapping end and a transversely slotted overlapping end, thecombination compri-sing a housing, a plate secured to the front end ofsaid housing, a cap secured to the rear end of said housing, a wormrotatably mounted in said housing between said plate and said cap, and ashoulder at the frontend of said. worm, said shoulder bearing againstsaid plate.

3. A clip, as claimed in claim 1, wherein projections are provided atthe front end of said housing and said plate has holes therein, saidprojections passing through said holes and being riveted over.

4. A clip, as claimed .in claim 1, wherein said plate is provided with acentral hole therein, and said worm has an operating head of smallerdiameter than said Worm and projecting through said central opening.

5. A clip, as claimed in claim 1, wherein said cap is domed, the rearend of said worm being correspondingly shaped.

6. A clip, as claimed in claim 1, wherein said cap is iiat, the rear endof said worm being correspondingly shaped.

7. A clip, as `claimed in claim 1, wherein the cap is secured to thehousing by spot Welding.

ROBERT CUTHBERT SCOTT JAMIE.

